iteratively plot each horizontal strip
stripPlot(l, ht, vfactor, ymargin, nameCEX, leftOver)No return value, called for side effects
is a list
character string $name the person's name
integer $start starting year
integer $end ending year
character string $color background color for the horizontal line
list of overlay pictures $pics, each entry contains
character string path name for a picture
integer year for placement of left edge of picture
is total height of entire graph
is height of a horizontal strip
is fraction of maxy to leave as top and bottom margin
control size of font in text() to display names associated with each horizontal strip
if TRUE then pictures that do not fit in horizontal strip are placed to left of strip rather than omitted